23403521443 has 4 divisors (see below), whose sum is σ = 23405162320. Its totient is φ = 23401880568.

The previous prime is 23403521437. The next prime is 23403521489. The reversal of 23403521443 is 34412530432.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23403521443 - 2⁵ = 23403521411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23403521423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798855 + ... + 827632.

It is an arithmetic number, because the mean of its divisors is an integer number (5851290580).

Almost surely, 2^23403521443 is an apocalyptic number.

23403521443 is a deficient number, since it is larger than the sum of its proper divisors (1640877).

23403521443 is a wasteful number, since it uses less digits than its factorization.

23403521443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640876.

The product of its (nonzero) digits is 34560, while the sum is 31.

The spelling of 23403521443 in words is "twenty-three billion, four hundred three million, five hundred twenty-one thousand, four hundred forty-three".